package catala
Compiler and library for the literate programming language for tax code specification
Install
Dune Dependency
Authors
Maintainers
Sources
0.6.0.tar.gz
md5=b22e238d5d5c8452067109e9c7c0f427
sha512=ccc8c557c67c2f9d1bed4b957b2367f0f6afc0ef9b8b83237cf2a2912b3e8829b7e8af78ea7fe00b20ecf28b436ad04b591e5fff4f82fd08725d40a18c9924d0
doc/src/catala.lcalc/ast.ml.html
Source file ast.ml
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(* This file is part of the Catala compiler, a specification language for tax and social benefits computation rules. Copyright (C) 2020 Inria, contributor: Denis Merigoux <denis.merigoux@inria.fr> Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. *) open Utils module D = Dcalc.Ast type lit = | LBool of bool | LInt of Runtime.integer | LRat of Runtime.decimal | LMoney of Runtime.money | LUnit | LDate of Runtime.date | LDuration of Runtime.duration type except = ConflictError | EmptyError | NoValueProvided | Crash type expr = | EVar of expr Bindlib.var Pos.marked | ETuple of expr Pos.marked list * D.StructName.t option (** The [MarkedString.info] is the former struct field name*) | ETupleAccess of expr Pos.marked * int * D.StructName.t option * D.typ Pos.marked list (** The [MarkedString.info] is the former struct field name *) | EInj of expr Pos.marked * int * D.EnumName.t * D.typ Pos.marked list (** The [MarkedString.info] is the former enum case name *) | EMatch of expr Pos.marked * expr Pos.marked list * D.EnumName.t (** The [MarkedString.info] is the former enum case name *) | EArray of expr Pos.marked list | ELit of lit | EAbs of (expr, expr Pos.marked) Bindlib.mbinder Pos.marked * D.typ Pos.marked list | EApp of expr Pos.marked * expr Pos.marked list | EAssert of expr Pos.marked | EOp of D.operator | EIfThenElse of expr Pos.marked * expr Pos.marked * expr Pos.marked | ERaise of except | ECatch of expr Pos.marked * except * expr Pos.marked module Var = struct type t = expr Bindlib.var let make (s : string Pos.marked) : t = Bindlib.new_var (fun (x : expr Bindlib.var) : expr -> EVar (x, Pos.get_position s)) (Pos.unmark s) let compare x y = Bindlib.compare_vars x y end module VarMap = Map.Make (Var) type vars = expr Bindlib.mvar let make_var ((x, pos) : Var.t Pos.marked) : expr Pos.marked Bindlib.box = Bindlib.box_apply (fun x -> (x, pos)) (Bindlib.box_var x) let make_abs (xs : vars) (e : expr Pos.marked Bindlib.box) (pos_binder : Pos.t) (taus : D.typ Pos.marked list) (pos : Pos.t) : expr Pos.marked Bindlib.box = Bindlib.box_apply (fun b -> (EAbs ((b, pos_binder), taus), pos)) (Bindlib.bind_mvar xs e) let make_app (e : expr Pos.marked Bindlib.box) (u : expr Pos.marked Bindlib.box list) (pos : Pos.t) : expr Pos.marked Bindlib.box = Bindlib.box_apply2 (fun e u -> (EApp (e, u), pos)) e (Bindlib.box_list u) let make_let_in (x : Var.t) (tau : D.typ Pos.marked) (e1 : expr Pos.marked Bindlib.box) (e2 : expr Pos.marked Bindlib.box) : expr Pos.marked Bindlib.box = let pos = Pos.get_position (Bindlib.unbox e2) in make_app (make_abs (Array.of_list [ x ]) e2 pos [ tau ] pos) [ e1 ] pos let ( let+ ) x f = Bindlib.box_apply f x let ( and+ ) x y = Bindlib.box_pair x y let option_enum : D.EnumName.t = D.EnumName.fresh ("eoption", Pos.no_pos) let none_constr : D.EnumConstructor.t = D.EnumConstructor.fresh ("ENone", Pos.no_pos) let some_constr : D.EnumConstructor.t = D.EnumConstructor.fresh ("ESome", Pos.no_pos) let option_enum_config : (D.EnumConstructor.t * D.typ Pos.marked) list = [ (none_constr, (D.TLit D.TUnit, Pos.no_pos)); (some_constr, (D.TAny, Pos.no_pos)) ] let make_none (pos : Pos.t) : expr Pos.marked Bindlib.box = let mark : 'a -> 'a Pos.marked = Pos.mark pos in Bindlib.box @@ mark @@ EInj (mark @@ ELit LUnit, 0, option_enum, [ (D.TLit D.TUnit, pos); (D.TAny, pos) ]) let make_some (e : expr Pos.marked Bindlib.box) : expr Pos.marked Bindlib.box = let pos = Pos.get_position @@ Bindlib.unbox e in let mark : 'a -> 'a Pos.marked = Pos.mark pos in let+ e = e in mark @@ EInj (e, 1, option_enum, [ (D.TLit D.TUnit, pos); (D.TAny, pos) ]) (** [make_matchopt_with_abs_arms arg e_none e_some] build an expression [match arg with |None -> e_none | Some -> e_some] and requires e_some and e_none to be in the form [EAbs ...].*) let make_matchopt_with_abs_arms (arg : expr Pos.marked Bindlib.box) (e_none : expr Pos.marked Bindlib.box) (e_some : expr Pos.marked Bindlib.box) : expr Pos.marked Bindlib.box = let pos = Pos.get_position @@ Bindlib.unbox arg in let mark : 'a -> 'a Pos.marked = Pos.mark pos in let+ arg = arg and+ e_none = e_none and+ e_some = e_some in mark @@ EMatch (arg, [ e_none; e_some ], option_enum) (** [make_matchopt pos v tau arg e_none e_some] builds an expression [match arg with | None () -> e_none | Some v -> e_some]. It binds v to e_some, permitting it to be used inside the expression. There is no requirements on the form of both e_some and e_none. *) let make_matchopt (pos : Pos.t) (v : Var.t) (tau : D.typ Pos.marked) (arg : expr Pos.marked Bindlib.box) (e_none : expr Pos.marked Bindlib.box) (e_some : expr Pos.marked Bindlib.box) : expr Pos.marked Bindlib.box = let x = Var.make ("_", pos) in make_matchopt_with_abs_arms arg (make_abs (Array.of_list [ x ]) e_none pos [ (D.TLit D.TUnit, pos) ] pos) (make_abs (Array.of_list [ v ]) e_some pos [ tau ] pos) let handle_default = Var.make ("handle_default", Pos.no_pos) let handle_default_opt = Var.make ("handle_default_opt", Pos.no_pos) type binder = (expr, expr Pos.marked) Bindlib.binder type scope_body = { scope_body_name : Dcalc.Ast.ScopeName.t; scope_body_var : Var.t; scope_body_expr : expr Pos.marked; } type program = { decl_ctx : D.decl_ctx; scopes : scope_body list }
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